MUSCA CORVINA 353 



lateral band. Fourth segment with a narrow black median longitudinal 

 band, and with similar bands and patches as the third segment. Length 

 7*5 to 8'5 mm. 



Female (Plate XLV, fig. 2). Thorax, silvery grey to yellowish grey, 

 with four narrow black longitudinal bands. Abdomen olive grey to dark 

 grey ; first segment almost entirely black. Second segment with a broad 

 black median longitudinal band, a rectangular yellowish grey patch at 

 each side, and a clove brown to nearly black lateral band, pointed at its 

 upper end and broad at its lower, forming a transverse band to the 

 segment. Third segment markings similar to those of the second, but 

 with a narrower median longitudinal band. Fourth segment with a 

 broad median longitudinal band, a clove brown narrow lateral stripe, and 

 shimmering patches at sides. Length 7 to 8*5 mm. 



This fly is larviparous and deposits one larva at a time in cow dung ; 

 the internal genital organs of the female are described on page 141, and 

 figured in Plate XXX, fig. 2. The mature larva, which measures 10'5 to 

 12'5 mm. in length, is greyish white with a lemon yellow dorsum. The 

 pnparium is of a dirty grey colour, with a yellowish tinge, and is not 

 unlike that of Musca pattoni. 



This species is common in two Indian hill stations, Kotagiri in 

 the Nilgheries, and Kodaikanal in the Pulneys ; Professor Bezzi informs 

 the writers that he has had specimens sent to him from Trichinopoly. 

 It is only seen on cattle ; it is closely allied to the European Musca 

 corvina, variety vivipara, Portschinski. 



Musca corvina, Fabr. (ovipara, Portschinski). Male. Thorax, dark 

 grey to bronze black, with four broad black longitudinal stripes. Abdo- 

 men yellowish brown with a reddish tinge in some lights ; first segment 

 entirely black ; second segment with a broad black median longitudinal 

 stripe, broadest at its upper and lower ends, and narrow in the centre ; 

 third segment with a narrow black median stripe broadening out at its 

 lower end. Fourth segment with a large central dark grey to olive grey 

 patch. Length 5 to 6 mm. 



Female. Thorax, light grey to dark grey, with four narrow longitudi- 

 nal stripes. Abdomen olive grey ; first segment dark at its upper border 

 and centre, and light at the sides ; second segment with a narrow black 

 median longitudinal stripe, a silvery patch at each side of this, a narrow- 

 olive grey lateral band, and silvery sides. Third segment with the same 

 markings. Fourth segment light olive grey, without any bands. Length 

 4'5 to 6'5 mm. 



According to Portschinski, Musca corvina ovipara lays about twenty-four 

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